What Are the Top Free Browser Fingerprint Analysis Tools Online?

Widely used free browser fingerprint test tools are Cover Your Tracks by the EFF, AmIUnique, BrowserLeaks and CreepJS. Each one reads what your browser reveals, such as canvas, WebGL, fonts and screen data, and shows how easy it is to recognize your browser. This guide compares these browser fingerprint test tools by who runs them, what they measure and where their limits are.

A browser fingerprint is a set of features that together can identify your browser without cookies. Our guide on browser fingerprinting explains how it works, and the online privacy check guide puts it next to IP and leak checks. speediq.org is this website and runs its own browser fingerprint test.

How Do Browser Fingerprint Testing Websites Compare for Accuracy and Detail?

No independent study measures the accuracy of these testing websites. The tools differ in their goal: some compare your fingerprint with other visitors, others show raw values or look for signs of spoofing. The table lists what each site states about itself (accessed 2026).

ToolRun byMain goalCompares with
Cover Your TracksElectronic Frontier FoundationTracker blocking and fingerprint uniquenessVisitors of the past 45 days
AmIUniqueTeam of researchers, hosted at InriaFingerprint uniqueness for researchThe sample it has observed so far
BrowserLeaksNot named on the siteRaw values per test: canvas, WebGL, fonts, JavaScriptNo uniqueness score
CreepJSOpen-source project (MIT license)Find weak spots of anti-fingerprinting toolsChecks for lies and spoofing
PixelscanNot named on the siteConsistency and detectability of the browser setupMismatches between signals
BrowserScanNot named in its privacy policyFingerprint, IP, WebRTC, DNS leak and bot detectionAn "authenticity" percentage

Cover Your Tracks (EFF)

Cover Your Tracks tests whether your browser blocks trackers and how unique your fingerprint is. The EFF started it in 2010 as Panopticlick, added the tracker test in 2015 and renamed it in 2020 (EFF, 2026). The result comes in "bits of identifying information" and compares your browser only with browsers tested in the past 45 days. The site says itself that it does not measure all forms of tracking.

AmIUnique

AmIUnique is run by a team of researchers and hosted at Inria. It collects features such as HTTP headers, time zone, screen, canvas, WebGL, audio formats and fonts (AmIUnique, 2026). Its FAQ says that uniqueness is measured against "the sample we have observed so far". When you start the test, it sets a cookie for four months to study how fingerprints change.

BrowserLeaks

BrowserLeaks has a separate page for each fingerprint test, for example canvas, WebGL, fonts and JavaScript. The canvas page draws a hidden image and turns it into a hash (BrowserLeaks, 2026). It shows detailed raw values, which helps if you want to see one feature at a time, but it gives no single uniqueness score.

CreepJS

CreepJS wants to "shed light on weaknesses and privacy leaks among modern anti-fingerprinting extensions and browsers" (CreepJS, 2026). The code is open source under the MIT license. The project says that only its version on GitHub Pages is official, so use abrahamjuliot.github.io/creepjs.

Pixelscan and BrowserScan

Pixelscan checks whether the signals of your browser fit together, for example a Windows user agent with macOS features (Pixelscan, 2026). It names users of antidetect browsers, proxies and automation as its audience. BrowserScan shows a fingerprint "authenticity" percentage and also checks IP, WebRTC and DNS leaks, but its page does not explain how it calculates the score. Both tools focus on detection, not on privacy advice.

What Is the Best Tool to See How Trackable My Browser Is?

For a quick answer, Cover Your Tracks shows both tracker blocking and fingerprint uniqueness in one test. AmIUnique adds research data, and BrowserLeaks shows the single values behind the result. Running two tools gives a fuller picture than one.

Which Browser Fingerprint Test Tools Help With Privacy Protection?

Tools that explain the result help you most with protection. Cover Your Tracks has a "Learn" section, and AmIUnique publishes its research. FingerprintJS is a different case: it is an open-source library that websites use to compute a visitor ID. Its own README says its accuracy is "significantly lower than in the commercial version" and that it is vulnerable to spoofing (FingerprintJS, 2026).

To compare how browsers resist fingerprinting, PrivacyTests.org runs automated tests on popular browsers in default settings. It is an independent open-source project by Arthur Edelstein, started in 2021 (PrivacyTests, 2026). Our privacy browser comparison explains Brave, Firefox and Tor in more detail.

How Unique Is a Browser Fingerprint?

It depends on who is in the sample. In the first Panopticlick study, 83.6 % of 470,161 browsers had a unique fingerprint, and the author called the sample of privacy-aware users "quite biased" (Eckersley, 2010). The AmIUnique team found about 90 % unique fingerprints in its 2016 data (Laperdrix et al., 2016).

This is why a test result can look different on two sites: each one compares you with its own visitors. A result of "unique" means unique in that sample, not in the whole internet.

How Do You Run a Browser Fingerprint Test Step by Step?

  1. Open the test in your normal browser with your usual extensions.
  2. Note the result, for example the bits of identifying information or the list of values.
  3. Change one thing: turn on stricter tracking protection or try another browser.
  4. Run the same test again and compare.
  5. Check one value in detail on BrowserLeaks, for example the canvas fingerprint.

A VPN or incognito mode does not change most of these values. For network leaks, use the VPN leak test tools instead.

Summary

Browser fingerprint test tools show what your browser reveals and how unique it is. Cover Your Tracks and AmIUnique compare you with their own visitors, BrowserLeaks shows raw values, and CreepJS looks for spoofing. No independent study ranks their accuracy, so compare two tools and change one setting at a time.

FAQ

What is the most accurate browser fingerprint test?

No independent study measures this. Cover Your Tracks and AmIUnique compare your browser only with their own visitors, so their results depend on their sample.

Is Cover Your Tracks the same as Panopticlick?

Yes. The EFF launched Panopticlick in 2010 and renamed it Cover Your Tracks in 2020.

Do fingerprint test sites store my data?

Some do. AmIUnique sets a cookie for four months for its research, and Cover Your Tracks compares you with browsers tested in the past 45 days. Read the privacy policy of each site.

Why does my browser look unique on one site but not on another?

Each site compares your fingerprint with a different group of visitors and collects different features, so the result changes from site to site.

Can a VPN change my browser fingerprint?

Mostly not. A VPN changes your IP address, but canvas, WebGL, fonts and screen values stay the same.

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